I tend to be lead footed sometimes too. In my style(still good nontheless), most of what we do is plantigrade(whole foot on the ground), with the exception of the cat stance, a tardigrade stance(partially). It's liek comparing a Grizzly bear's stance to that of the Siberian tiger. Both animals have been known to weigh several hundred pounds, the former even going over 1000. The tiger, due to walking in a tardigrade(on its' toes) is quicker on the get up and go but the grizzly is a lot harder to knock down. However, the grizzly can still outrun a horse over a short distance, it just can not cut corners as well as the tiger. Basically, the heavy footedness means you shouldn 't have too much problems w/stability. So try to get more feeling on the balls of your feet., even if you train w/steeltoes. just don't bounce(at least not all the time). If you train w/heavy shoes a lot, try a lighter shoe, such as wrestling shoes. You'll notice a difference in your footwork, be it stance, jump(if applicable) and kick.